Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012		Jul. 02, 2011
Cash flows from operating activities:
Net income	$ 129,831		$ 154,374
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	14,603		13,698
Amortization	4,267		3,710
Stock-based compensation	17,608		13,767
Net gain on sale of available-for-sale securities	(712)		(334)
Amortization of debt discount on convertible debentures	3,938		3,856
Derivatives - revaluation and amortization	629		(358)
Tax benefit from exercise of stock options	617		5,301
Excess tax benefit from stock-based compensation	(806)		(6,029)
Changes in assets and liabilities:
Accounts receivable, net	(42,979)		41,781
Inventories	11,137		14,484
Deferred income taxes	19,535		16,020
Prepaid expenses and other current assets	2,648		(7,746)
Other assets	163		(3,204)
Accounts payable	23,065		(12,843)
Accrued liabilities	(10,216)		4,677
Income taxes payable	(80)		4,178
Deferred income on shipments to distributors	(10,302)		(7,638)
Net cash provided by operating activities	162,946		237,694
Cash flows from investing activities:
Purchases of available-for-sale securities	(1,150,526)		(1,014,822)
Proceeds from sale and maturity of available-for-sale securities	876,823		644,444
Purchases of property, plant and equipment	(8,342)		(13,789)
Other investing activities	(3,788)		(29,989)
Net cash used in investing activities	(285,833)		(414,156)
Cash flows from financing activities:
Repurchases of common stock	(90,707)		(65,654)
Proceeds from issuance of common stock through various stock plans	8,221		25,421
Payment of dividends to stockholders	(58,066)		(50,456)
Excess tax benefit from stock-based compensation	806		6,029
Net cash used in financing activities	(139,746)		(84,660)
Net decrease in cash and cash equivalents	(262,633)		(261,122)
Cash and cash equivalents at beginning of period	788,822	[1]	1,222,359
Cash and cash equivalents at end of period	526,189		961,237
Supplemental disclosure of cash flow information:
Interest paid	7,875		7,875
Income taxes paid, net of refunds	$ 4,470		$ 1,618

[1] Derived from audited financial statements